[    6.690380] ------------[ cut here ]------------
[    6.691750] WARNING: CPU: 0 PID: 300 at drivers/gpu/drm/drm_modeset_lock.c:345 drm_modeset_lock+0x10f/0x120 [drm]
[    6.693183] Modules linked in: amdgpu(+) rtsx_usb_sdmmc mmc_core rtsx_usb ohci_pci(+) sr_mod cdrom sd_mod crc32c_intel hwmon i2c_algo_bit serio_raw drm_kms_helper ohci_hcd syscopyarea ehci_pci ahci ehci_hcd libahci sysfillrect sysimgblt fb_sys_fops libata ttm usbcore drm scsi_mod agpgart button dm_mirror dm_region_hash dm_log dm_mod
[    6.697809] CPU: 0 PID: 300 Comm: systemd-udevd Not tainted 4.11.5_1 #1
[    6.701076] Call Trace:
[    6.702727]  ? dump_stack+0x55/0x7c
[    6.704364]  ? __warn+0x105/0x120
[    6.705988]  ? drm_modeset_lock+0x10f/0x120 [drm]
[    6.707605]  ? drm_modeset_lock+0x10f/0x120 [drm]
[    6.709186]  ? warn_slowpath_null+0x1f/0x30
[    6.710762]  ? drm_modeset_lock+0x10f/0x120 [drm]
[    6.712338]  ? drm_modeset_lock_all_ctx+0x15/0xa0 [drm]
[    6.713902]  ? drm_modeset_lock_all+0x13/0xa0 [drm]
[    6.715445]  ? drm_modeset_lock_all+0x47/0xa0 [drm]
[    6.716954]  ? drm_crtc_force_disable_all+0x1c/0xb0 [drm]
[    6.718580]  ? vprintk_default+0x2c/0x30
[    6.720234]  ? amdgpu_device_fini+0x1f/0x130 [amdgpu]
[    6.721468] hub 4-0:1.0: USB hub found
[    6.721479] hub 4-0:1.0: 5 ports detected
[    6.721760] ohci-pci 0000:00:13.0: OHCI PCI host controller
[    6.721770] ohci-pci 0000:00:13.0: new USB bus registered, assigned bus number 5
[    6.721791] ohci-pci 0000:00:13.0: irq 18, io mem 0xf02c9000
[    6.729266]  ? amdgpu_driver_unload_kms+0x3e/0x80 [amdgpu]
[    6.730756]  ? amdgpu_driver_load_kms+0x118/0x230 [amdgpu]
[    6.732194]  ? drm_dev_register+0x10f/0x1d0 [drm]
[    6.733605]  ? drm_dev_register+0x140/0x1d0 [drm]
[    6.734989]  ? pci_find_capability+0x4c/0x70
[    6.736367]  ? drm_get_pci_dev+0x94/0x170 [drm]
[    6.737752]  ? pci_device_probe+0x8d/0xf0
[    6.739141]  ? devices_kset_move_last+0x56/0xe0
[    6.740520]  ? sysfs_create_link+0x1d/0x40
[    6.741890]  ? driver_probe_device+0x221/0x480
[    6.743254]  ? kernfs_create_dir_ns+0x3d/0x70
[    6.744608]  ? pci_match_device+0xc1/0xf0
[    6.745952]  ? sysfs_create_dir_ns+0x38/0xa0
[    6.747276]  ? __driver_attach+0xd9/0x100
[    6.748580]  ? klist_next+0x73/0x100
[    6.749884]  ? driver_probe_device+0x480/0x480
[    6.751169]  ? bus_for_each_dev+0x4f/0x90
[    6.752426]  ? driver_attach+0x16/0x20
[    6.753655]  ? driver_probe_device+0x480/0x480
[    6.754861]  ? bus_add_driver+0x187/0x280
[    6.756050]  ? driver_register+0x51/0xe0
[    6.757220]  ? 0xf8997000
[    6.758370]  ? 0xf8997000
[    6.759503]  ? do_one_initcall+0x3f/0x190
[    6.760607]  ? 0xf8834000
[    6.761651]  ? __vunmap+0x68/0xd0
[    6.762627]  ? kmem_cache_alloc+0x74/0x1a0
[    6.763543]  ? do_init_module+0x14/0x1b5
[    6.764438]  ? do_init_module+0x43/0x1b5
[    6.765293]  ? load_module+0x1ef8/0x2510
[    6.766119]  ? irqtime_account_irq+0x4d/0xc0
[    6.766948]  ? SyS_init_module+0x127/0x180
[    6.767780]  ? do_fast_syscall_32+0x80/0x140
[    6.768611]  ? entry_SYSENTER_32+0x4e/0x7c
[    6.769490] ---[ end trace 13add021fd9cd362 ]---
[    6.770367] BUG: unable to handle kernel NULL pointer dereference at 0000000c
[    6.771245] IP: ww_mutex_lock+0xc/0x40
[    6.772118] *pdpt = 00000000351ed001 *pde = 0000000000000000 

[    6.773992] Oops: 0002 [#1] PREEMPT SMP
[    6.774984] Modules linked in: amdgpu(+) rtsx_usb_sdmmc mmc_core rtsx_usb ohci_pci(+) sr_mod cdrom sd_mod crc32c_intel hwmon i2c_algo_bit serio_raw drm_kms_helper ohci_hcd syscopyarea ehci_pci ahci ehci_hcd libahci sysfillrect sysimgblt fb_sys_fops libata ttm usbcore drm scsi_mod agpgart button dm_mirror dm_region_hash dm_log dm_mod